Norseman Drill & Tool Type 37-ACN Fractional 52º Helix Angle Titanium Carbon Nitride Spiral Flute Semi-Bottoming Taps

Norseman Drill & Tool Type 37-ACN Fractional 52º Helix Angle Titanium Carbon Nitride Spiral Flute Semi-Bottoming Taps

Norseman Drill & Tool Type 37-ACN Fractional Spiral Flute Semi-Bottoming Taps are engineered for maximum cutting performance, exceptional durability, and superior thread quality in demanding applications. Featuring a steep 52º helix angle and a premium Titanium Carbon Nitride (TiCN) coating, these taps deliver outstanding chip evacuation, reduced friction, and extended tool life—making them ideal for high-production environments and precision machining.

Advanced TiCN Coating for Superior Wear Resistance

The Titanium Carbon Nitride coating dramatically increases cutting surface hardness, providing exceptional resistance to abrasion, heat, and wear. This advanced coating enhances lubricity, allowing smoother cutting action and reducing torque during tapping. TiCN-coated taps excel in abrasive or hard-to-machine materials, maintaining sharper cutting edges and improving thread accuracy over longer production runs.

High-Performance 52º Helix Angle

Optimized for Deep Blind Holes

The aggressive 52º helix angle creates a highly efficient spiral flute that rapidly lifts chips out of deep or narrow cavities. This prevents chip packing, reduces the risk of tap breakage, and ensures cleaner, more accurate threads in both blind and through holes. The design is particularly effective in soft, ductile metals such as aluminum, copper alloys, brass, and softer steels.

Semi-Bottoming Geometry for Versatility

Cut Threads Close to the Bottom

The semi-bottoming profile provides enhanced flexibility by combining plug-tap ease of starting with the ability to cut threads close to the bottom of blind holes. This makes the Type 37-ACN ideal for applications requiring precision, depth control, and high-quality threaded finishes.

Key Benefits

• TiCN coating increases hardness and dramatically improves wear resistance

• 52º helix angle ensures fast, efficient chip evacuation

• Spiral flute design ideal for deep blind holes and soft, ductile metals

• Semi-bottoming geometry allows threading close to the hole bottom

• Fractional sizing for compatibility with U.S. standard tooling

Norseman Type 37-ACN taps deliver long-lasting, high-performance threading solutions for demanding shops and production environments.